As long as a system can be defined in terms of itself it fits the definition of recursion if we are to follow the official definition of recursion. Whether tha

As long as a system can be defined in terms of itself it fits the definition of recursion if we are to follow the official definition of recursion. Whether that recursion is capable of doing certain things is another matter entirely. This is a semantic issue. Not worth it to get to deep into how I define a word or how you define a word. But I will say that my definition of the word recursion is more inline with the official definition, and that official definition does encompass an opamp. Source: https://en.m.wikipedia.org/wiki/Recursion https://en.m.wikipedia.org/wiki/Recursion (see first sentence)